Chuck.



ERNEST R.` SIBERT, OF COLORADO SPRINGS, COLORADO.

CHUCK.

Specification of Letters Pat-ent.

Patented Dec. s, lees.

' Application led August 8, 1908. Serial No. 447,603.

T o all whom it may concern:

Be it known thatI, ERNEST R. Srnnn'r, a citizen of the United States, residing at -Colorado Springs, in the county of El Paso and State of Colorado, have invented new and useful Improvements in Chucks, of which the following is a specification.

My invention pertains to chucks for use on polishing or bufiing lathes and turning lathes; and it contemplates the provision of a chuck constructed with a view of saving time when itis necessary to stay a tool carrier in order to examine the work that is being turned or to remove a buff from the tool carrier and replace it with a buff of different character, the staying or sto ping of the tool carrier in order to attain t e ends stated being accomplished without the necessity of stopping the lathe. This will be appreciated when it is romeinbered that in those cases Where electric power is used, the starting of the lathe involves the loss of considerable power, and4 that, therefore, my im )rovements are materially advantageous ecause a saving of both time and power expense is effected by the use thereof.

With the foregoing in mind, the nature Aof my invention, and its novelty, utility and practical advantages will be fully understood from the following description and claims when the saine are read in. connection with the drawings, accompanying and formingvpart of this specification, in which:

igure 1 is a general view of the chuck constituting the best ractical embodiment of my invention of which I am cognizant. Fig. 2 is' a longitudinal, diametrical'section of the chuck; the same being shown with the buff removed from the tool-carrier which is illustrated as adapted for the connection. of a buff. Figs. 3 and 4 are transverse sections of the chuck Ataken in the planes indicated by gie lines 3 3 and 1t-4, respectively, of

Similar letters i designate corresponding parts in'all of the views ofthe drawings, re-

erring to which:

A is an arbor. B a tool-carrier, shown. s ecifically as a buff-carrier, and C, a shift s eeve, comprised in the construction illustrated. The arbor A is exteriorly threaded at its rear end for connection to the lathe portion from which it is to derive motion, and is provided with the following features, to Wit: an oil cup l), an oil duct c extending from the cup t to the side of the arbor at an intermediate point in the length thereof, and

designed to lead oil to the hard-felt washer, presently described, a shoulder or ilange d arranged on the outsideof the arbor, and a slightly tapered forwarden'd `e. The said tapered portion e of the arbor is designed to co erat'e with the tapered portion f of the soc iet g in the buff carrier B, which buffcarrier is provided, in addition to the socket q, with 4a forwardly tapered and cxteriorly threaded portion h and with a rear exteriorly threaded portion i. In its forward end the arbor A is preferably rovided with a kerffor the engagement of a screw-driver employed in disengaging arbor from the lathe spindle. The said exteriorly threaded portion t' of the buff carrier B is for the .engagement of a "shift nut D and a lock nut E; the.shift nut D being rovidedwith a bank pin j, and the lock nut E having a similar pin 76 and said pins havin for their purpose to prevent the two nuts rom becoming ocked. 1t will also be observed by reference to Figs. 2 and 3 that the lock nut E is provided with a 'screw l by which it is fixed on the portion t' of the buff-carrier, and that carriedin the shift sleeve C are three (more or less) screws m by which it is fixed to the shift nut D. It will be noticed at this point that the exterior thread on the portion t of the buff-carrier B is designed to serve as' .a snift screw, and that the portion e of the arbor A is designed 'to serve as a frictionl taper. Said portion e of the arbor and the rear end of the shift Asleeve are preferablyy case-hardened. It will be noted here that in `addition to the screws lIn, the shift sleeve C is provided in rear of the shoulder or flange d with an inwardly directed flange 1', and that a hard-fiber washer r2 is interposed between said flanges, this in order to render the running of the chuck ractically noiseless, and prevent cutting of t e bearing.

As will beobserved by ference to. Fig. 2 the eduction orifice of the oil duct c is surrounded by a washer F, of hard-felt orother suitable hard,'absorbent material, which is inclosed in the shift sleeve C, and it will also be observed that an oil vacuum is afforded between the forward end of the arbor and the opposed end wall of the socket g in the buff-carrier.

The felt washer F serves to supply the inclosed parts with oil so as to render the chuck self-lubricating for an indefinite period, and also serves for the frictional transmission of v mentioned oil vacuum has for its office to form a cushion at the forward end of the arbor Ato prevent the same becoming jammed in the socket g of` the tool-carrier. The "shift nut D serves fp .carry the tool-carrier B back and forth from locking oint to unlocking. The screw l holding the ock' nut E on the tool-carrier B ma be loosened when it is desired to adjust t ie nut to gage the cushion effect in the before mentioned oil vacuum. By adjustment of the lock nut E,

the locking and unlocking at E and F are equalized.

In the practical use of my novel chuck, it is simply necessary When the tool-carrier B is to be stopped for the operator to take hold of and sto the lshift sleeve C.

It wi l be obvious from the foregoing that my improvements may be embodied in a chuck having a tool-carrier at the right-hand end thereof, as shown, or in a chuckiliavin a tool-carrier at the left-hand end thereof, t 1e only difference between the two chucks residing in the disposition of the threads on certain parts thereof.

Experience has demonstrated that W ,ien my novel chuck is used in connection with a polishing bud it saves approximately onealf of the time necessary to a polishing operation and approximately one-third of the electric energy employed to drive the* lathe spindle. Having described my invention, What I claim and desire to secure by Letters-,Pa ent, is:

1. A chuck for the purpose described, comprising an arbor, a tool-carrier, and Ineansfor rotating the tool-carrier incidental to rotation of the arbor and adapted When stopped to effect stoppage of the tool-carrier.

2. In a chuck, the combination of an arbor,

a tool-carrier, a "shift sleeve, means intermediate the arbor and the shift sleeve for rotating the latter by the former, and means intermediate the "shift sleeve and the tool-carrier for normally rotatin the tool-carrier incidental to rotation o the arbor and adapted when the shift sleeve is stopped to effect stoppage of the tool- Acarrier' notwithstanding the continued rotation of the arbor.

3. The combination in a chuck, of an arbor having an exterior shoulder or Hange and a friction taper, a tool-carrier socketed to receive the arbor and the friction taper thereof and having a rear, exteriorly threaded portion, a shift nut on said threaded ortion, a shift sleeve connected With t e said shift nut and having a ange disposed in rear of the, shoulder or ange of the arbor, and a friction Washer interposed between the arbor and the stift sleeve.

4.-. The combination in a chuck of an arbor having an exterior shoulder or flange and a friction taper and also having an bi1 duct the eduction orifice of which is disposedl at its side, a friction Washer, of absorbent material, surrounding the arbor and arranged to receive oil from the said duct, a tool-carrier socketed to receive they arbor and the friction taper thereof and having a rear exteriorly threaded portion, a shift nut arranged on said threaded portion and rovided With a bank pin, a lock nut detacha ly fixed on said threaded portion and also having a bank pin, and a shift sleevesurrounding the rear portion of the tool-carrier, the nuts and the frictionr Washer and connected With the shift nut and having a fiange disposed in rear of the shoulder or flange of the arbor.

In testimonywhereof I have hereunto set my hand in presence of .two subscribing Witnesses.

ERNEST RSIBERT. Witnesses:

LUoIUs P. LAW'roN, JOHN S. McCoMBs. 

